This B+W Interference Filter has a completely colorless glass carrier coated with a number of extremely thin, partially reflecting layers with precisely computed thicknesses, similar to MRC coating. It does not block by means of absorption, but by interference of the unwanted UV and IR radiation that is repeatedly reflected between these layers,

This B+W Interference Filter has a completely colorless glass carrier coated with a number of extremely thin, partially reflecting layers with precisely computed thicknesses, similar to MRC coating. It does not block by means of absorption, but by interference of the unwanted UV and IR radiation that is repeatedly reflected between these layers,